2015-07-20 11:40, Stephen Hemminger: > The number of descriptors can be either zero to use the whole > available ring, or some value smaller. This is used to limit > the number of mbufs allocated for the receive ring. If more > descriptors are requested than available the size is silently > truncated. [...] > + if (nb_desc == 0 || nb_desc > vq_size) > + nb_desc = vq_size;
This behaviour should be common to every drivers and explained in the API doxygen: http://dpdk.org/browse/dpdk/tree/lib/librte_ether/rte_ethdev.h?id=v2.1.0-rc1#n1843
